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三氧化钛

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Given the current complexity of industrial recovery of 3'-methyl-2'-butenyl 3, 3-dimethyl-pentenoate and the decomposition problems with 2-methyl-1-butene, research was conducted on a process for direct recycling of MBDP involving an ester exchange reaction of MBDP with either methanol, trimethyl orthoacetate, or solutions of methanol and trimethyl orthoacetate.

针对目前工业上回收3,3-二甲基-4-戊烯酸-3'-甲基-2'-丁烯酯工艺复杂、异戊烯大量分解问题,研究了MBDP直接返回循环使用工艺,MBDP与甲醇、原乙酸三甲酯或与甲醇原乙酸三甲酯混合溶液进行酯交换反应的回收新工艺,比较了四异丙基钛酸酯、甲醇钠、氢氧化钾用作酯交换催化剂的效果,筛选出回收MBDP&一锅煮&最佳工艺:按照n:n:n:n=1.0:9.8:9.2:0.05物质的量比投料,74℃~78℃反应21h,MBDP转化为贲亭酸甲酯和异戊烯醇,单程转化率87.7%,用85%的磷酸中和甲醇钠,蒸出甲醇,直接用于合成贲亭酸甲酯。

Water; Glycerin; Sodium Laureth Sulfate; Polyethylene; Acrylates/C10-30 Alkyl Acrylate Crosspolymer; Lauryl Glucoside; Phenoxyethanol; Microcrystalline Wax; Fragrance; Methylparaben; Menthyl Lactate; Sodium Hydroxide; Tetrasodium EDTA; Cellulose; Lactose; Sodium Ascorbyl Phosphate; Acrylates/Ammonium Methacrylate Copolymer; Hydroxypropyl Methylcellulose; Mica; Talc; Titanium Dioxide; Tocopheryl Acetate; Triethyl Citrate; Cucumis Sativus Fruit Extract; Citrus Grandis Fruit Extract; Panax Ginseng Root Extract; Zingiber Officinale Root Extract; Iron Oxides; Red 30; Yellow 5; Yellow 5 Lake

水;甘油;钠Laureth硫酸盐;聚乙烯; Acrylates/C10-30烷基丙烯酸酯Crosspolymer ;十二烷基糖苷; Phenoxyethanol ;微晶蜡;香水; Methylparaben ;薄荷乳酸;氢氧化钠; Tetrasodium乙二胺四乙酸;纤维素;乳糖;钠抗坏血酸磷酸酯;丙烯酸酯/铵甲基丙烯酸共聚物;羟丙基甲基纤维素;云母;滑石粉;二氧化钛; Tocopheryl醋酸;三柠檬酸;黄瓜水果提取物;柚皮果提取物;人参根提取物;生姜根提取物;铁氧化物;红30 ;黄河5 ;黄河5湖

Water; Glycerin; Sodium Laureth Sulfate; Polyethylene; Acrylates/C10-30 Alkyl Acrylate Crosspolymer; Lauryl Glucoside; Phenoxyethanol; Microcrystalline Wax; Fragrance; Methylparaben; Menthyl Lactate; Sodium Hydroxide; Tetrasodium EDTA; Cellulose; Lactose; Sodium Ascorbyl Phosphate; Acrylates/Ammonium Methacrylate Copolymer; Hydroxypropyl Methylcellulose; Mica; Talc; Titanium Dioxide; Tocopheryl Acetate; Triethyl Citrate; Cucumis Sativus Fruit Extract; Citrus Grandis Fruit Extract; Panax Ginseng Root Extract; Zingiber Officinale Root Extract; Iron Oxides; Red 30; Yellow 5; Yellow 5 Lake.

成分Ingredients 水;甘油;钠Laureth硫酸盐;聚乙烯; Acrylates/C10-30烷基丙烯酸酯Crosspolymer ;十二烷基糖苷; Phenoxyethanol ;微晶蜡;香水; Methylparaben ;薄荷乳酸;氢氧化钠; Tetrasodium乙二胺四乙酸;纤维素;乳糖;钠抗坏血酸磷酸酯;丙烯酸酯/铵甲基丙烯酸共聚物;羟丙基甲基纤维素;云母;滑石粉;二氧化钛; Tocopheryl醋酸;三柠檬酸;黄瓜水果提取物;柚皮果提取物;人参根提取物;生姜根提取物;铁氧化物;红30 ;黄河5 ;黄河5湖

Mesoporous Ti02 is also synthesized with glycerol and pentaerythrite as temp-lates separately.It is characterized by TEM,XRD,BET and FTIR etc.

以多元醇类化合物结构相近的丙三醇,季戊四醇有机小分子化合物为模板剂制备出了中孔纳米二氧化钛粉体,对所得粉体进行了透射电镜,傅立叶红外,N2吸附一脱吸,粉末X一射线衍射等的测试。

These results above indicated that ordered mesoporous titanosilicate with different Si/Ti molar ratio could be obtained using trimeric surfactant C_(14-2-14-2-14) as templating agent and the Si/Ti ratio could be as low as 5 without the losing of mesostructure ordering.

上述结果说明以自组装能力强的三聚表面活性剂C_(14-2-14-2-14)为模板剂可以制得不同钛含量的介孔硅钛酸盐材料,尤其是可以得到Si/Ti比低至5的高钛含量介孔硅钛酸盐材料,这对于提高此类材料的氧化催化性能有重要意义。

Based on the analysis of organic geochemical characteristics, Inorganic geochemical exploration methods and nano-geochemical exploration methods were adopt to research geochemistry on the surface above the Xin Chang gas field,and it is discovered there is abnormity of trace element ,for example , Cu、Zn、Ni、V、Fe_2O_3、Ba、W、Sb、Ag、Y、Zr、La and Ba、Sr、Ti、Cu、Zn、Ni、Al、P、La series、Y、Co、W、Ag、Nb、Tl ect, showing the top effects and chimney effects,which is important to indicate gas reservoir.

本文以有机地球化学特征分析方法为基础,采用无机地球化学勘探方法和纳米级地球化学勘探方法对新场气田上方地表无机地球化学和纳米级地球化学特征进行综合研究,发现了无机微量元素铜、锌、镍、钒、三氧化二铁(Fe_2O_3)、钡、钨、锑、银、钇、锆、镧等及纳米级微量元素钡、锶、钛、铜、锌、镍、铝、磷、镧系除钷(Pm、钇、钴、钨、银、铌、铊等元素在气田上方异常特征呈现顶端效应或烟囱效应,该类元素对气田的勘探具有重要的指示意义。

Sorbitol, Water, Hydrated Silica, PEG 32, Sodium Lauryl Sulfate, SD Alcohol 38B, Flavor, Cellulose Gum, Zinc Citrate Trihydrate, Sodium Saccharin, Titanium Dioxide.

山梨醇,水,硅酸,PEG 32,月桂基磺酸钠,SD Alcohol 38B,纤维素胶,柠檬酸锌三水化合物,糖精钠,二氧化钛

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It has been put forward that there exists single Ball point and double Ball points on the symmetrical connecting-rod curves of equilateral mechanisms.

从鲍尔点的形成原理出发,分析对称连杆曲线上鲍尔点的产生条件,提出等边机构的对称连杆曲线上有单鲍尔点和双鲍尔点。

The factory affiliated to the Group primarily manufactures multiple-purpose pincers, baking kits, knives, scissors, kitchenware, gardening tools and beauty care kits as well as other hardware tools, the annual production value of which reaches US$ 30 million dollars.

集团所属工厂主要生产多用钳、烤具、刀具、剪刀、厨具、花园工具、美容套等五金产品,年生产总值3000万美元,产品价廉物美、选料上乘、质量保证,深受国内外客户的青睐

The eˉtiology of hemospermia is complicate,but almost of hemospermia are benign.

血精的原因很,以良性病变为主。